ios/web/string_util_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ios/web/public/string_util.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace web {
  11
  12 // Tests that a regular sentence is clipped correctly.
  13 TEST(StringByClippingLastWordTest, ClipRegularSentence) {
  14   const base::string16 kInput =
  15       base::UTF8ToUTF16("\nSome text here and there.");
  16   EXPECT_EQ(kInput, GetStringByClippingLastWord(kInput, 100));
  17 }
  18
  19 // Tests that a long sentence exceeding some length is clipped correctly.
  20 TEST(StringByClippingLastWordTest, ClipLongSentence) {
  21   // An arbitrary length.
  22   const size_t kStringLength = 10;
  23   base::string16 string(kStringLength, 'a');
  24   string.append(base::UTF8ToUTF16(" b cdefghijklmnopqrstuvwxyz"));
  25   // The string should be cut at the last whitespace, after the 'b' character.
  26   base::string16 result =
  27       GetStringByClippingLastWord(string, kStringLength + 3);
  28   EXPECT_EQ(kStringLength + 2, result.size());
  29   EXPECT_EQ(0u, string.find_first_of(result));
  30 }
  31
  32 // Tests that a block of text with no space is truncated to kLongStringLength.
  33 TEST(StringByClippingLastWordTest, ClipLongTextContentNoSpace) {
  34   // Very long string.
  35   const size_t kLongStringLength = 65536;
  36   // A string slightly longer than |kLongStringLength|.
  37   base::string16 long_string(kLongStringLength + 10, 'a');
  38   // Block of text with no space should be truncated to kLongStringLength.
  39   base::string16 result =
  40       GetStringByClippingLastWord(long_string, kLongStringLength);
  41   EXPECT_EQ(kLongStringLength, result.size());
  42   EXPECT_EQ(0u, long_string.find_first_of(result));
  43 }
  44
  45 }  // namespace web